[projmgr] Set rebuild flag in cbuild-idx.yml

[grasci-arm]

Address csolution part of #1592

[codecov]

Codecov Report

Attention: Patch coverage is 84.44444% with 7 lines in your changes missing coverage. Please review.

Project coverage is 63.67%. Comparing base (d6df877) to head (dfc63ea).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1605      +/-   ##
==========================================
+ Coverage   63.65%   63.67%   +0.02%     
==========================================
  Files         162      162              
  Lines       31373    31409      +36     
  Branches    19229    19255      +26     
==========================================
+ Hits        19971    20001      +30     
- Misses       7529     7531       +2     
- Partials     3873     3877       +4     

Flag	Coverage Δ
projmgr-cov	80.60% <84.44%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
tools/projmgr/src/ProjMgr.cpp	78.41% <85.71%> (ø)
tools/projmgr/src/ProjMgrYamlEmitter.cpp	94.46% <89.47%> (-0.15%)	⬇️
tools/projmgr/test/src/ProjMgrUnitTests.cpp	79.39% <78.94%> (-0.02%)	⬇️

... and 1 file with indirect coverage changes

[github-actions]

Test Results

    3 files     18 suites   7m 35s ⏱️
  349 tests   349 ✅ 0 💤 0 ❌
1 047 runs  1 047 ✅ 0 💤 0 ❌

Results for commit dfc63ea.